In the valleys along the Three Gorges of the Yangtze River, the roar of large excavation equipment broke the silence of the rock walls. On September 23, 2026, the excavation of the main building of the Fengjie Pumped Storage Power Station in Chongqing officially began. The project has fully transitioned from early preparation to the main construction phase, and the giant energy storage base of the Chongqing power grid is accelerating in the mountains next to the Three Gorges.

The core line project has officially started construction

Fengjie pumped storage is a key implementation project of the 14th Five Year Plan for the medium and long-term development of pumped storage in China. It is also the first pumped storage project implemented by Three Gorges Group in Chongqing, with a total installed capacity of 1.2 million kilowatts. The underground main factory building, as a key project route, has successfully cleared the core node obstacles for the subsequent installation of mechanical and electrical equipment and the timely commissioning of the power station.

As of late September, all transportation tunnels within the project site have been fully connected, and 82% of the excavation of the upper and lower reservoir foundations has been completed. The entire 35 kV construction power supply network within the site has been put into operation, and over 120 sets of large-scale construction equipment have been deployed at the construction site. The overall construction progress is 15 days ahead of expectations.

Sichuan Chongqing power grid peak shaving capacity replenishment and acceleration

After completion, the power station will undertake core functions such as peak shaving, valley filling, energy storage, frequency regulation, phase adjustment, and emergency backup for the Chongqing power grid. It can consume approximately 1.6 billion kilowatt hours of surplus new energy electricity during low valley periods each year, and output over 1.2 billion kilowatt hours of high-quality peak shaving electricity during peak periods, greatly alleviating the power supply pressure during the dry season of the Sichuan Chongqing power grid. Keywords: pumped storage, new energy news

At present, the total installed capacity of pumped storage in operation and under construction in Sichuan and Chongqing has exceeded 8.5 million kilowatts, gradually forming an energy storage peak shaving network covering the Chengdu Chongqing economic circle. Under the hard rock wall, the cutterhead of the tunneling machine slowly advances forward, and Fengjie Pumped Storage is gradually converting the potential energy of the mountains and waters along the Three Gorges into flexible adjustment capabilities to support the stable operation of the new power system.Editor/Cheng Liting